<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
 <head>
  <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"/>
  <title></title>
  <style>
	div,span,b{
		/*width: 150px;
		height:150px;
		border: 1px solid #cacaca;*/
	}
	#d2{
		border: 1px solid #cacaca;
		/*min-height: 50px;
		max-height: 100px;*/
		height: 50px;
		overflow: /*hidden;visible;scroll;*/auto
	}
  </style>
 </head>

 <body>
  <div>一个区块</div>
  <b>一个分区</b>
  <hr/>

  <div id="d2">二个区块<br/>二个区块<br/>二个区块<br/></div>
 </body>
</html>
